/* 
 * 体育新闻网站 - 全新设计风格
 * 采用深色渐变主题 + 橙红色强调色
 * 独特的斜切设计和动态效果
 */

/* === CSS变量定义 === */
:root {
    --primary-dark: #0d1117;
    --secondary-dark: #161b22;
    --accent-orange: #ff6b35;
    --accent-red: #e63946;
    --accent-gold: #ffd700;
    --text-light: #f0f6fc;
    --text-muted: #8b949e;
    --gradient-main: linear-gradient(135deg, #0d1117 0%, #1a1f2e 50%, #0d1117 100%);
    --gradient-accent: linear-gradient(90deg, #ff6b35 0%, #e63946 100%);
    --gradient-card: linear-gradient(145deg, #1a1f2e 0%, #0d1117 100%);
    --shadow-glow: 0 0 30px rgba(255, 107, 53, 0.3);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.5);
    --border-radius: 16px;
    --transition-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === 基础重置 === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: var(--gradient-main);
    color: var(--text-light);
    line-height: 1.8;
    min-height: 100vh;
    overflow-x: hidden;
}

/* === 通用工具类 === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

/* === 顶部导航 === */
.site-header {
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 107, 53, 0.2);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.site-logo img {
    height: 48px;
    width: auto;
}

.site-logo span {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* === 主导航菜单 === */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-list li a {
    display: block;
    padding: 10px 20px;
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 8px;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.nav-list li a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--gradient-accent);
    transition: var(--transition-fast);
}

.nav-list li a:hover::before,
.nav-list li a.active::before {
    width: 80%;
}

.nav-list li a:hover {
    color: var(--accent-orange);
    background: rgba(255, 107, 53, 0.1);
}

/* === 移动端菜单按钮 === */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: 2px solid var(--accent-orange);
    color: var(--accent-orange);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
}

/* === Hero横幅区域 === */
.hero-section {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 4rem 0;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(13, 17, 23, 0.9) 0%, rgba(13, 17, 23, 0.6) 50%, rgba(230, 57, 70, 0.3) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    background: var(--gradient-accent);
    color: white;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 20px rgba(0, 0, 0, 0.5);
}

.hero-title span {
    color: var(--accent-orange);
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-accent);
    color: white;
    padding: 16px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(255, 107, 53, 0.5);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-light);
    padding: 16px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    border: 2px solid var(--accent-orange);
    transition: var(--transition-fast);
}

.btn-secondary:hover {
    background: var(--accent-orange);
    color: white;
}

/* === 斜切分割线 === */
.skew-divider {
    height: 80px;
    background: var(--secondary-dark);
    clip-path: polygon(0 0, 100% 60%, 100% 100%, 0 100%);
    margin-top: -40px;
}

/* === 栏目卡片网格 === */
.channels-section {
    padding: 5rem 0;
    background: var(--secondary-dark);
}

.channels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.channel-card {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition-fast);
    border: 1px solid rgba(255, 107, 53, 0.1);
    position: relative;
}

.channel-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: var(--transition-fast);
}

.channel-card:hover::before {
    transform: scaleX(1);
}

.channel-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card);
    border-color: rgba(255, 107, 53, 0.3);
}

.channel-img {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.channel-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-fast);
}

.channel-card:hover .channel-img img {
    transform: scale(1.1);
}

.channel-tag {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--accent-red);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.channel-body {
    padding: 1.5rem;
}

.channel-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-light);
}

.channel-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.channel-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-orange);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.channel-link:hover {
    gap: 12px;
}

/* === 新闻列表 === */
.news-section {
    padding: 5rem 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.news-card {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.news-card:hover {
    border-color: rgba(255, 107, 53, 0.3);
    box-shadow: var(--shadow-card);
}

.news-thumb {
    height: 220px;
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-fast);
}

.news-card:hover .news-thumb img {
    transform: scale(1.05);
}

.news-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.news-category {
    color: var(--accent-orange);
    font-weight: 600;
}

.news-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.news-title a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition-fast);
}

.news-title a:hover {
    color: var(--accent-orange);
}

.news-excerpt {
    color: var(--text-muted);
    font-size: 0.95rem;
    flex: 1;
}

/* === 关于我们 === */
.about-section {
    padding: 5rem 0;
    background: var(--secondary-dark);
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-img {
    position: relative;
}

.about-img img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-card);
}

.about-img::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border: 3px solid var(--accent-orange);
    border-radius: var(--border-radius);
    z-index: -1;
}

.about-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about-content p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem;
    background: rgba(255, 107, 53, 0.1);
    border-radius: 12px;
    border-left: 3px solid var(--accent-orange);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

/* === 用户评论 === */
.reviews-section {
    padding: 5rem 0;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.review-card {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
}

.review-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 5rem;
    color: rgba(255, 107, 53, 0.2);
    font-family: Georgia, serif;
    line-height: 1;
}

.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.review-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.review-info h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.review-info span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.review-stars {
    color: var(--accent-gold);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.review-text {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

.review-date {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* === FAQ手风琴 === */
.faq-section {
    padding: 5rem 0;
    background: var(--secondary-dark);
}

.faq-list {
    max-width: 900px;
    margin: 3rem auto 0;
}

.faq-item {
    background: var(--gradient-card);
    border-radius: 12px;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-fast);
}

.faq-question:hover {
    color: var(--accent-orange);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--accent-orange);
    transition: var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 2rem 1.5rem;
    color: var(--text-muted);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* === 支付方式 === */
.payment-section {
    padding: 5rem 0;
}

.payment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.payment-card {
    background: var(--gradient-card);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-fast);
}

.payment-card:hover {
    border-color: rgba(255, 107, 53, 0.3);
    transform: translateY(-5px);
}

.payment-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.payment-name {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.payment-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* === 牌照信息 === */
.license-section {
    padding: 5rem 0;
    background: var(--secondary-dark);
}

.license-box {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    padding: 3rem;
    display: flex;
    align-items: center;
    gap: 3rem;
    border: 1px solid rgba(255, 107, 53, 0.2);
    flex-wrap: wrap;
}

.license-badge {
    width: 150px;
    height: 150px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.license-badge img {
    width: 80%;
    height: 80%;
    object-fit: contain;
}

.license-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.license-info p {
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.license-number {
    display: inline-block;
    background: rgba(255, 107, 53, 0.2);
    padding: 8px 16px;
    border-radius: 8px;
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--accent-orange);
    margin-top: 0.5rem;
}

/* === 客户支持 === */
.support-section {
    padding: 5rem 0;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.support-card {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-fast);
}

.support-card:hover {
    border-color: rgba(255, 107, 53, 0.3);
    box-shadow: var(--shadow-glow);
}

.support-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
}

.support-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
}

.support-card p {
    color: var(--text-muted);
}

/* === 页脚 === */
.site-footer {
    background: var(--primary-dark);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 107, 53, 0.2);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 1rem;
    font-size: 0.95rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.footer-social a {
    width: 44px;
    height: 44px;
    background: rgba(255, 107, 53, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-orange);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-social a:hover {
    background: var(--accent-orange);
    color: white;
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-orange);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-badges {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.age-badge {
    background: var(--accent-red);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

/* === 面包屑导航 === */
.breadcrumb {
    padding: 1rem 0;
    background: rgba(0, 0, 0, 0.3);
}

.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.breadcrumb-list li::after {
    content: '/';
    margin-left: 0.5rem;
    color: var(--text-muted);
}

.breadcrumb-list li:last-child::after {
    display: none;
}

.breadcrumb-list a {
    color: var(--text-muted);
    text-decoration: none;
}

.breadcrumb-list a:hover {
    color: var(--accent-orange);
}

.breadcrumb-list li:last-child {
    color: var(--accent-orange);
}

/* === 内页样式 === */
.page-header {
    padding: 4rem 0;
    background: var(--gradient-card);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero-stadium-fc9x0f.webp') center/cover;
    opacity: 0.2;
}

.page-header-content {
    position: relative;
    z-index: 1;
}

.page-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 1.2rem;
}

.page-content {
    padding: 4rem 0;
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.content-wrapper h2 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    color: var(--accent-orange);
}

.content-wrapper h3 {
    font-size: 1.4rem;
    margin: 1.5rem 0 0.75rem;
}

.content-wrapper p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.content-wrapper ul, .content-wrapper ol {
    margin: 1rem 0 1rem 2rem;
    color: var(--text-muted);
}

.content-wrapper li {
    margin-bottom: 0.5rem;
}

/* === APP下载页 === */
.app-section {
    padding: 5rem 0;
}

.app-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.app-mockup {
    text-align: center;
}

.app-mockup img {
    max-width: 300px;
    border-radius: 30px;
    box-shadow: var(--shadow-card);
}

.app-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.app-info p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.app-features {
    margin: 2rem 0;
}

.app-feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: rgba(255, 107, 53, 0.1);
    border-radius: 12px;
}

.app-feature-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.download-btns {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--gradient-card);
    border: 2px solid var(--accent-orange);
    color: var(--text-light);
    padding: 16px 28px;
    border-radius: 12px;
    text-decoration: none;
    transition: var(--transition-fast);
}

.download-btn:hover {
    background: var(--accent-orange);
}

.download-btn-icon {
    font-size: 2rem;
}

.download-btn-text {
    text-align: left;
}

.download-btn-text small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.download-btn-text span {
    font-weight: 700;
    font-size: 1.1rem;
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .about-grid, .app-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-img {
        order: -1;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .main-nav {
        display: none;
        width: 100%;
        margin-top: 1rem;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .nav-list {
        flex-direction: column;
    }
    
    .nav-list li a {
        padding: 12px 16px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 8px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-section {
        min-height: 60vh;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .channels-grid, .news-grid, .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .license-box {
        flex-direction: column;
        text-align: center;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .page-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .download-btns {
        flex-direction: column;
    }
    
    .download-btn {
        width: 100%;
        justify-content: center;
    }
}

/* === 打印样式 === */
@media print {
    .site-header, .site-footer, .hero-section {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}